3 Ton 14 SEER 80% AFUE 80,000 BTU Goodman Gas Furnace and Air Conditioner System - Downflow Review 2026

// Bottom Line

This Goodman system delivers solid mid-tier efficiency at an excellent price point, making it ideal for homeowners replacing older equipment on a budget. It's particularly well-suited for smaller homes or modest cooling loads in temperate climates where 14 SEER is sufficient.

Review

The Goodman 3-ton system at SKU LS38343830 occupies smart middle ground in the HVAC market. It combines a gas furnace with air conditioning in one package, eliminating the need to source and coordinate separate units. At $732, this downflow configuration appeals to contractors needing dependable equipment without premium pricing. Online Supply positions this as a straightforward replacement solution for homes previously served by 3-ton systems.

Performance specs reveal balanced engineering for typical residential needs. The furnace delivers 80,000 BTU of heating output with 80% AFUE efficiency and two-stage burner operation, allowing the system to modulate between high and low fire for more consistent temperature control. Cooling capacity sits at 36,000 BTU with 14 SEER efficiency. The scroll compressor paired with a multi-speed blower motor (up to 1600 CFM) provides flexibility across seasons. Electrical requirements are modest at 208/230v single-phase 60Hz with a maximum breaker size of 30 amps.

Pros & Cons

Pros

14 SEER cooling efficiency matches or exceeds many mid-range systems at this price
80% AFUE furnace heating with two-stage burners provides responsive comfort control
Multi-speed blower motor (maximum 1600 CFM) allows fine-tuned airflow for different seasons
Scroll compressor is proven, reliable technology with lower failure rates than alternatives
10-year warranty with online registration provides solid protection at this price tier

Cons

80% AFUE is standard but not high-efficiency; modern systems reach 95% AFUE
Single-stage condenser means the AC runs at full capacity even during mild weather
73 dB noise level is louder than quieter premium units, which may matter in quiet neighborhoods
Not Energy Star certified, missing potential rebate eligibility in some utility programs

Who Should Buy

Best For

Homeowners with 3-ton cooling needs in moderate climates who prioritize upfront savings over premium efficiency. Contractors installing systems in rental properties, older homes being retrofitted, or budget-conscious customers seeking reliable baseline equipment will find strong value here.

Consider Alternatives If

Buyers in very hot regions needing maximum cooling capacity should consider higher SEER ratings, and those in cold climates should explore 95% AFUE furnaces for better long-term heating efficiency.

3 Ton 14 SEER 80% AFUE 80,000 BTU Goodman Gas Furn

$732

Buy at HVACDirect →

Installation

This A-coil downflow unit measures 30 inches tall by 17.5 inches wide by 21 inches deep, fitting standard utility closets and basement installations. Requires metal exhaust flue for safe combustion venting. Refrigerant lines include 3/4-inch suction line with matching valve and 3/8-inch liquid line, both standard sizes for 3-ton systems. Installation demands proper ductwork sizing and electrical connection, typically a 4 to 6-hour job for certified technicians.

Warranty & Reliability

Goodman provides a 10-year parts warranty when you register the unit online after purchase. This covers compressor, refrigerant components, and blower motor. The extended protection is competitive for this price range, though premium brands sometimes offer longer terms. Registration is straightforward and typically completed during installation.

Specifications

SKU	LS38343830
Brand/Manufacturer	Online Supply
Cooling BTU	36,000
Heating BTU	80,000
Refrigerant	R410A or R22
Electrical	208 / 230v 1 Phase 60 Hz
Warranty	10 Years with Online Registration
Decibel Level (dBA)	73
Weight (in lbs)	35.000000
Feature	Spec
Safety Information	PROPOSITION 65 WARNING This product and many products on our site may contain a chemical know to the state of California to cause cancer or birth defects or other reproductive harm. For more information about Proposition 65 please Click Here.
Exhaust Flue Requirement	Metal
Furnace Efficiency / AFUE	80%
Blower Motor	Multi-Speed
Maximum CFM	1600
Configuration	Upflow / Downflow
Burner Stages	Two
Fuel Type	Gas
Height	30"
Width	17.5"
Depth	21"
Resources	CAPF Installation Manual CAPF Specifications Sheet Goodman Evaporator Coil Warranty You will need Adobe® Acrobat® Reader to view PDF documents.
Energy Star	No
SEER1 (Efficiency)	14
Condenser Stages	Single Stage
Compressor Type	Scroll
Liquid Line	3/8"
Suction Line	3/4"
Liquid Valve Size	3/8"
Suction Valve Size	3/4"
Max Breaker Size	30 Amps
Min. Breaker Size	18.7 Amps
Tonnage	3 Ton
Style	A-Coil
Suction Line Insulation Thickness	3/4"
Length	30 feet

Frequently Asked Questions

What does 14 SEER mean for my cooling costs? +

SEER 14 means the unit removes 14 BTU of heat per watt of electricity consumed. This is middle-tier efficiency. Modern units reach SEER 16-20, which save 15-30% more on cooling bills. For moderate climates with seasonal AC use, 14 SEER is adequate and cost-effective.

Can this system work with my existing ductwork? +

Possibly, but verify sizing. The unit's 1600 CFM maximum requires ducts designed for 3-ton systems. If your home previously had 3-ton equipment, existing ducts should work. Get an HVAC contractor to measure and confirm before purchase.

How does 80% AFUE furnace efficiency compare to newer models? +

80% AFUE is standard baseline efficiency. Modern high-efficiency models reach 95% AFUE, cutting heating costs by roughly 20%. The $732 price reflects this trade-off. For moderate climates with shorter winters, 80% AFUE keeps overall system cost low while delivering adequate warmth.

Is a Goodman system reliable compared to name brands like Trane or Lennox? +

Goodman uses proven components like scroll compressors and two-stage burners. Reliability is comparable to mid-tier Trane or Lennox models. Failures typically stem from installation quality and maintenance, not brand. This system should operate 12-15 years with proper service.

Does this system qualify for energy rebates? +

No, it lacks Energy Star certification. Many utility companies offer $300-800 rebates for Energy Star units or higher SEER ratings. Check your local utility. The $732 price is attractive enough that rebate ineligibility may not offset the savings.

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